Revoluble seat



C. M. HANSEN.

REVOLUBLE SEAT. APPLlcAloN FILED FEB. 1, 1919.

C. M. HANSEN.

REVOLUBLE SEAT.

APPLxcATloN FILED FEB.1,1919.

Patented Apr. 2,0, 1920.

2 SHEETS-SHEET 2 Arm/mfr FFE STATES all',

QFFCE.

REVOLUBLE SEAT.

Specification of Letters Patent.

Patented Apr. 20, 1920.

Application filed February 1, 1919. Serial No. 274,430.

To all 'whom it may concern.'

Be it known that I, CHnIs'rEN M. HANsnN, a citizen of Norway, residing in Jersey City, county of Hudson, and State of New Jersey, have invented certain new and useful Improvements in Revoluble Seats, of which the following is a full, clear and exact specification.

My invention relates to revoluble seats and refers particularly to revoluble seats capable of being maintained at predetermined positions.

The obj ect of my invention is a revoluble seat which will automatically position itself at a predetermined position and which is capable of being fixed in an operative position by the weight of the user.

My device is so constructed that it is maintained in a predetermined position by the weight of the user, thus insuring an immovable seat which is particularly desirable in the use of machines, such as sewing ators limbs is liable to move the chair seat thus interfering considerably with the com- \fort and efficiency of the operator.

My device is also so constructed tha when the operator arises the seat will automatically swing out of position allowing unobstructed movement along the passageway or room. This feature is particularly valuable in factories in which there are a large number of seated operators, and in restaurants, in which the presence of a number of ordinary chairs is serious in the event of panic due to re or other causes. By the use of the chairs of my device, the room is instantly cleared of obstructing chairs thus allowing free access to the exits.

These two features, which are combined in my device, make the chairs of my invention economical and convenient in use, in addition to which they possess safety attributes of the greatest value.

In the forms of the device of my invention, shown in the accompanying' drawings, similar parts are designated' by similar numerals y Figure 1 is a broken top plan view of one form of my device. the normal position of the device being indicated in dotted lines.

Fig. 2 is a section through the line 2 2 of Fig. 1.

Fig. 3 is a broken section through the line 3 3 of Fig. 2.

Fig. 4 is a broken side plan view in the direction of the arrow 1 of Fig. 3, showing the device with a weight upon the seat.

Fig. 5 is a broken side plan view in the direction of the arrow 5 of Fig. 3, showing the device in its normal position.

Fig. 6 is a top plan view showing a series of my devices around a table.

The particular form of the device of my invention, shown in Figs. 1 lto 5 inclusive, of the accompanying illustrations, comprises a pipe-supporting member 10 carrying the two outwardly extended stop-pins 11 and 12. A sleeve 13 is fiXedly attached to the support 10 by the set-screw 14. Bew oluble around the support 10 is a seat-carrying member 15, carrying the seat 16. The upper face of the sleeve 13 contains a recess 16 formed by the two shoulders 17 and 18. Vithin the recess 16 at the shoulder 18 is an annular recess 19. Upon the under face of the member 15 is a stud 2O capable of placement within the recess 19. Within the sleeve 13 is a coiled spring 21, one end of which is affixed to the lower part of the sleeve 13 and the other end of which is affixed to the member 15, the spring 21 normally retaining` the member 15 in the position 15 of Fig. 1, the upward tension of the spring tending to raise the stud 2O from within the recess 19. The upper end of the supporting member 22 is attached to the member 15 and the lower end is revoluble around the pipe 10. In the particular use of my device, as shown in Figs. 1 to 5 inclusive, a sewing machine is placed upon the table 23 and the table 24C, yof which the member 10 is one of the supports, carries the goods to be sewed.

The o peration of the device is as follows:

lWhen the device is in its normal position, it is in the position shown by the dotted lines in Fig. 1, the stud 20 abutting upon the shoulder 17 to prevent further movement of the member 15, as shown in Fig. f1, the seat 16 is thus beneath the table 24 and out of the way. Vhen it is desired to use the seat 16, the member 15 is revolved until further movement is prevented by the stud 2O abutting upon the shoulder 18. `When a person then seats himself upon the seat 16, the stud 20 enters the recess 19, thus preventing the revolution, or movement, of the member 15 and the seat 16. lVhen the weight is removed from the seat 16, the spring forces the member 15 upwardly, the upward movement being stopped by the stud 11, thus re.

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leasing the stud 2O from the recess 19 and allowing the spring 21 to revolve the member 15 into its original position, the revolution being stopped by the abutment of the stud 2O against the shoulder 17. When a person is seated upon the seat 16, there is no dangerof movement of the seat and vhence the person can effectively-` operate. .a sewing` machine on the table 28.

Fig. ,6 illustrates a series of the devices of my invention in the lusevwith a table 24C. .In this case'thecmember -15 is curved and the seat16 lis replacedVy by a revolublebacked chair 25.

It is evident that .by changing the-length of the recess 16, the-seat maybe made to revolve to any desired y.position whenit will. leastk interfere with travel -alongthe passageways or across the room.

I do .not limit myselfto the particularv size, shape, ,number or arrangement of parts as describedand shown, all of which may be varied;:without goingv beyond the scope of myinvention. as described and claimed.

What Ixclaimis l. Ina deviceof the character. specified,-y

in combination, a support, a xed sleeve recess withiny the, first recess, .a projection upon the lower face ofthe seat-carrying member vabuttable upon the `first recess vand capable of .insertion vwithi-nothesecond. re-

cess, means ,wherebya weight uponthe seat-y sition and to remove the projection from the second recess when the weight is-removed and means for limiting-this removal movement.

2. In a device of thecharacter specified,

in combinatiomfa support, a fixecl..sleeve upon the support, a seat-carrylng member -slidable over vand revo-luble uponthe sup-l port and abuttable upon the sleeve, a recess within the upperk face of the sleeve, a secondl recess within `the first recess, a projection upon the lower face of the seat-carrying w Vmember abuttable uponthe first recess-and capable of' insertionwithin the second .re-

cess, means whereby a weight upon the seatcarrying member will place the vprojection n within the second recess preventing the movementv of the seat-carryingrmember, a spring attachedto thesleeve andi theseatcarrying member tendingto maintainA the seat-.carrying memberin a normal predeter-v mined posi-tionrandto remove the projection n from the Vsecondrecess vwhen Athe weight is removed and means.A for limiting this re-` {moval movement so that the projection will notbe removedfi'rom the. first recess.

Signed at JerseyCity, inthe countyrof v Hudson and State of New Jersey, this 30th day ofJanuary,. 1919.

CHRISTEN M. HANSEN. 

